Answer : 3. "चना"
Explanation :

Monocotyledons are plants whose seeds have only one cotyledon. Examples include garlic, onion, palm, coconut etc. If the seeds of any plant have two cotyledons, it is known as dicotyledonous plants. Examples include mustard, jute, lemon, orange etc. These are seen in angiosperm plants only when these plants have a seed coat.