The correct option is D.
Explanation:
(a) Pistils fused together - Syncarpous
(b) Formation of gametes - Gametogenesis
(c) Hyphae of higher ascomycetes - Dikaryotic
(d) Unisexual female flower-Pistillate
Concept Enhancer Always remember, in Biology the ***** word "Syn" signifies togethemess or fusion.