Which of the following orders are correct as per the properties mentioned against each?
a. As2O3 < SiO2 < P2O3 < SO2 Acid strength.
b. AsH3 < PH3 < NH3 Enthalpy of vaporisation.
c. S < O < Cl < F More negative electron gain enthalpy.
d. H2O > H2S > H2Se > H2Te Thermal stability.
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)