I am 22yrs old . My height is 5" and weight is 54kg.is it OK or should I reduce it? *** guide me and send the solutions.

It's impossible to tell just from that. I don't even if you are male or female.

Take a look at yourself naked, and be honest. Do you have rolls of fat around your waist? How big or small is your waist compared with your hips? Do you have any visible muscle definition?

No bt my hips r a bit large n m a girl

Every girl thinks her hips are a bit large. If your waist is good, and you don't wobble when you walk, then I wouldn't worry about it.

You aren't very tall, matter fact I think my pencil is taller than you 0.0. You should contact Ripley's, I think.

However, 5' @ 120 pounds seems pretty reasonable to me, perhaps look at testing your BMI and not so much your weight.