The expression for efficiency gain due to regeneration if a, b, n correspond to alpha, beta, cycle efficiency respectively, is?

n = ((a x a x b)/((a ‚Äö√Ñ√∂‚àö√ë‚àö¬® b)(a + 2b) 2 ))

n = ((a x a x b)/((a + b)((a + 2b)2))

n = ((a x a x b)/((a ‚Äö√Ñ√∂‚àö√ë‚àö¬® b)(a + 2b)2))

n = ((a x a x b)/((a + b)(a + b)2))

n = ((a x a x b)/((a + b)(a + 2b)3))

The expression for efficiency gain due to regeneration if a, b, n corr

1.	The expression for efficiency gain due to regeneration if a, b, n correspond to alpha, beta, cycle efficiency respectively, is?
A.	n = ((a x a x b)/((a + b)((a + 2b)<sup>2</sup>))
B.	n = ((a x a x b)/((a ‚Äö√Ñ√∂‚àö√ë‚àö¬® b)(a + 2b)<sup>2</sup>))
C.	n = ((a x a x b)/((a + b)(a + b)<sup>2</sup>))
D.	n = ((a x a x b)/((a + b)(a + 2b)<sup>3</sup>))
Answer» B. n = ((a x a x b)/((a ‚Äö√Ñ√∂‚àö√ë‚àö¬® b)(a + 2b)<sup>2</sup>))