Let
$a=2^{202}, \quad b=22^{20} \quad \text { and } \quad c=20^{22} .$
Then

• A

  $a \lt b \lt c$
• B

  $b \lt a \lt c$
• C

  $c \lt b \lt a$
• Correct answer
  D

  $b \lt c \lt a$

Hence, the correct answer is option: 'D'.