Question

What is the innermost layer of the sun’s atmosphere called? A. photosphere B. chromosphere C. troposphere D. corona

Answer 1

The suns atmosphere contains many layers but the innermost one would be
A. Photosphere

Answer 2

Aloha!
 The innermost layer of the sun's atmosphere is called...
  A.
 The photosphere is the innermost layer of the sun!
 
 I hope this helps!