Choose the list below that properly arranges the order of spectra classes (from hottest to coldest)

Select one:

a. T, L, M, K, G, F, A, B, O

b. O, B, G, A, M, K, F, L, T

c. O, B, A, F, G, K, M, L, T

d. A, B, F, G, K, L, M, O, T

c. O, B, A, F, G, K, M, L, T

Explanation:

The class and the temperature range are as follows -

Class The temperature range -

O ≥ 30,000 K

B 10,000-30,000 K

A 7,500-10,000 K

F 6,000-7,500 K

G 5,200-6,000 K

K 3,700-5,200 K

M 2,400-3,700 K

The the order of the stars which can be arranged as per the spectrum is given below -

O, B, A, F, G, K, M, L, T