Correct option: 4
Explanation: In ornithophilous plants, flowers lack fragrance. Such flowers secrete profuse dilute nectar. They do not have any smell as birds have a poor sense of smell.
Correct option: 4
Explanation: In ornithophilous plants, flowers lack fragrance. Such flowers secrete profuse dilute nectar. They do not have any smell as birds have a poor sense of smell.