NEET 2026 question paper with solutions

1. We need to check each statement one by one against the known anatomy of a frog.

2. Statement A: The hepatic portal system is indeed the special venous connection that carries blood between the liver and intestine, so this statement is correct.

3. Statement B: Frogs have only 10 pairs of cranial nerves, not twelve (twelve pairs is a mammalian feature), so this statement is incorrect.

4. Statement C: In female frogs, the ureters (carrying excretory waste) and the oviducts (carrying eggs) are separate ducts that open independently into the cloaca, so this statement is correct.

5. Statement D: The hind-brain actually consists of the cerebellum and medulla oblongata only; the optic lobes belong to the mid-brain, so this statement is incorrect.

6. Statement E: The sinus venosus is a thin-walled triangular sac that collects deoxygenated blood and opens into the right atrium of the heart, so this statement is correct.

7. Since A, C, and E are the correct statements, they match option D.

Hence, the answer is D (A, C and E only).

1. To find features that distinguish male frogs from female frogs, we must separate structures that are common to both sexes from those that are sex-specific.

2. Features such as bulging eyes, webbed digits in feet, and olive green skin with dark irregular spots are body characteristics shared by both male and female frogs, so they cannot be used to tell the sexes apart.

3. Vocal sacs are membranous pouches found only in males, used to amplify their mating call — this is a true sex-distinguishing feature.

4. The copulatory pad (a rough, thickened cushion) on the first digit of the fore limb is also found only in males, helping them grip the female firmly during amplexus (mating clasp).

5. Since only vocal sacs (B) and the copulatory pad (D) are exclusive to males, these are the correct distinguishing features.

Hence, the answer is D (B and D only).

1. Match 2,4-D with its use: 2,4-D is a synthetic auxin widely sprayed on fields to kill broad-leaved weeds. So,

$$\text{2,4-D} \rightarrow \text{Herbicide (III)}$$

2. Match $\mathrm{GA}_3$ with its industrial use: gibberellic acid is used to speed up the malting process in the brewing industry by promoting amylase production in barley seeds. Therefore,

$$\mathrm{GA}_3 \rightarrow \text{Brewing industry (I)}$$

3. Match Kinetin with its physiological role: kinetin is a cytokinin that helps in mobilizing nutrients from other parts of the plant toward the site where it is applied, thereby delaying senescence. Hence,

$$\text{Kinetin} \rightarrow \text{Nutrient mobilisation (IV)}$$

4. Match ABA with its stress response role: abscisic acid increases in concentration during water stress and causes the closure of stomata to reduce water loss through transpiration. So,

$$\text{ABA} \rightarrow \text{Stimulation of stomatal closure (II)}$$

Hence, the correct matching is A-III, B-I, C-IV, D-II, so the answer is A.