Statement 1: In hydrogen and hydrogen like species, orbital energy depends only on the quantum number n whereas in multi-electron atoms it depends on quantum numbers n and l.
Statement 2 : The principal quantum number determine the size and the energy of the orbital.

Answer

b

Explanation

The only electrical ineraction present in hydrogen and hydrogen like species is the attraction between the negatively charged electron and the positively charged nucleus. In multi-electron atoms, besides this attraction, there is mutual repulsion among the electrons in multi-electron atoms, Hence energy depends upon n and l both.