Refer to the given dichotomous key and select the correct option regarding them.
I. (a) It is a flowering plant. -Go to II
(b) It is a non-flowering plant - P
II. (a) It possesses reticulate venation. Go to III
(b) It possesses parallel venation. -Go to IV
III. (a) It stores food in its root - Q
(b) It stores food in its stem. - R
IV. (a) It stores food in its leaf. - S
(b) It stores food in its seed. - T

Options

A. P could be Azolla whereas R could be onion.
B. Q could be carrot whereas T could be maize.
C. S could be mustard whereas T could be gram.
D. Q could be radish whereas S could be coriander.

Explanation

To solve the problem using the given dichotomous key, we will follow the steps outlined in the key to classify the plants based on their characteristics.

### Step-by-step Solution:

1. **Determine if the plant is flowering or non-flowering:**
- The first question in the dichotomous key is whether the plant is a flowering plant or a non-flowering plant.
- If it is a flowering plant, we go to II. If it is a non-flowering plant, we identify it as P.

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