which book should i consult for question and mcq for competition exams seperate for all 3 subjects as i am confused so as to practise from which book.

Dear Student,

Please have a look at the names of the books-

Maths

Differential Calculus – Arihant

Integral Calculus – Arihant

Coordinate - & L Loney

Algebra – K.C.Sinha

Chemistry

Physical Chemistry – O.P.Tandon

Inorganic – NCERT

Organic – Solomon

Physics

H.C. Verma or Hallidaus, Resnick and Walker

Thanks !!!

Once you have mastered your basic concepts you should letter jump to a standard material of any reputed institute because these are very much  uptodate and in accordance with SEE papers.