Correct Answer - Option 1 : 49

The logic followed here is:

**Logic:** In the above question, the given code is the square of the number of all letters in each word.

**Word** |
**Numbers of letters** |
**Square of number** |

DAY |
3 |
9 |

NIGHT |
5 |
25 |

**EVENING** |
**7** |
**49** |

Hence, the correct answer is **"49".**