The inflorescence of wheat is known as

✅ Explanation:
-The inflorescence of wheat is indeed called an ear or spike. It is a type of unbranched inflorescence where sessile (stalkless) spikelets are directly attached to the central axis (rachis).

📌 Other Options Explanations:
-(b) Raceme: A raceme is an unbranched inflorescence with stalked flowers arranged along the main axis.
-(c) Panicle: A panicle is a branched inflorescence with further branching in the flower cluster.
-(d) Umbel: An umbel is an inflorescence where all the flower stalks arise from a common point, like the spokes of an umbrella.