Which of the following is not true in case of Indifference curves?
1
The Indifference curves are usually convex or bowed inward.
2
Indifference curve for two goods that are perfect compliments is shaped as right angles.
3
Indifference curve for two goods that are perfect substitutes is a downward sloping straight line.
4
Indifference curve for two normal goods is a downward sloping straight line.