Which metro has become the first metro to use UV rays to sanitize train coaches?

1. 

Which metro has become the first metro to use UV rays to sanitize train coaches?
[A]. Delhi Metro
[B]. Lucknow Metro
[C]. Chennai Metro
[D]. Mumbai Metro

Answer: Option B

Explanation:

Lucknow Metro has become the 1st metro in the country to use ultraviolet rays to sanitize train coaches.

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