SAT Math Question of the Day

Q: Which of the following are true, if 0 < a < 1 and 0 < b < 1?

1. √ a  * √ b  > √ (a * b)
2. √ a  + √ b  > √ (a + b)
3. √ a  + √ 2b  < √ (a + 2 b)

1. I only
2. II only
3. III only
4. II and III
5. I, II, and III