The correct option is B 10ml of 0.1 M H2SO4 + 10ml of 0.1 M NaOH
(A) Eq. mole of H2SO4=2×0.1×20; eq. mole of NaOH=0.3×20
(B) Eq. mole of H2SO4=2×0.1×10; eq. mole of NaOH=0.2×20
(C) Eq. mole of H2SO4=0.1×2×10; eq. mole of NaOH=0.1×10
[D] Eq. mole of H2SO4=0.1×2×20; eq. mole of NaOH=0.1×40
Only in option [C], eq. mole of H2SO4> eq. mole of NaOH, so it is acidic.