जिसको jiskō

जो jō (hindi)

Relative pronoun (without distinction of gender or number): who, that, which, what. Can be coupled with vah creating an identity relationship between the two terms of two propositions in the sentence.

को kō (hindi)

को is used for denoting:

• A Person who 'does' something involuntarily (such as—like, dislike, remember, be injured, be offended, suffer, feel, enjoy, receive, happen, to have, to meet, to know, to see or to hear, or to do something under compulsion, requirement, necessity, obligation, etc.).
• An Animate Object, provided it denotes a particular being.
• The object of a Verb in the Neutral Construction.
• Every Secondary Object (which is usually animate).
• The Object of a Verb requiring a predicative word (referring to the object).
• Nouns denoting time when used adverbially.
  (A Basic Grammar of Modern Hindi)