The correct option is C PH3<AsH3<NH3<SbH3 (Order of boiling point )
CsH < KH < NaH < LiH
The stability of the hydrides of the element from a particular group decreases with increasing atomic number (going down the group )
CH4<NH3<H2O
Dipole moment depends upon the different between the electronegativitiies of the bonded atoms, and the internucler separation.
PH3<AsH3<NH3<SbH3
Boiling point increase with an increase in molecular mass, NH3 being an exception because of strong hydrogen bonding
Cl < S < N < O < F
The strength of hydrogen bonding depends upon the electrongativity and the size. Higher electronegativity and smaller size increases the strength of hydrogen bonding