The question asks for the number of secondary ($2^\circ$) carbon atoms in the given compound, but the structure/image of the compound is missing from the prompt. Without the actual compound, the number of secondary carbons cannot be determined uniquely.

1. What is a $2^\circ$ carbon?

A carbon atom is called secondary if it is directly attached to two other carbon atoms.

• $1^\circ$ carbon: attached to 1 carbon
• $2^\circ$ carbon: attached to 2 carbons
• $3^\circ$ carbon: attached to 3 carbons
• $4^\circ$ carbon: attached to 4 carbons

2. Why the answer cannot be computed here

The problem says, "In the given compound..." but the compound itself is not shown in the text you provided. Since counting $2^\circ$ carbons depends entirely on the structure, the answer cannot be derived from the available information alone.

3. About the stored answer

The stored correct answer is D = One. Since the structure is absent, I cannot independently verify that value from the given prompt.

So, based on the provided information, the problem is incomplete.