Auxins are abundantly produced in
Meristematic region of shoot
The correct option is D.
Explanation of correct option:
Explanation of incorrect options:
Option A.
Auxin is produced in roots as well but not abundantly.
Option B.
Auxin is produced in the apex of the shoot, not in the base.
Option C.
Auxin is produced in a shoot but in the apex, at the meristematic region.
Final answer: Hence auxins are produced abundantly in the meristematic region of the shoot.