Step 1: Understanding the Question:
This question tests knowledge of plastid types.
Step 2: Detailed Explanation:
Leucoplasts are non-pigmented plastids.
They are involved in the storage of starch, lipids, and proteins.
Amyloplasts (C) are a type of leucoplast that store starch.
Chloroplast (A): Pigmented (chlorophyll).
Chromoplast (D): Pigmented (carotenoids).
Thus, leucoplasts are the non-pigmented plastids.
Step 3: Final Answer:
Thus, non-pigmented plastids are leucoplasts, which corresponds to option (B).
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