Insert the missing character marked as 6?'.

Given is a statement followed by two arguments. Decide which of the arguments is/are strong with respect to the statement.
Statement:
There is an increase in mobile usage and cell phone towers.
Arguments:
I. It shows global development and fast and easy way to get connected with the wider world.
II. In the long run, there will be more signals that will affect the normal functioning of the ecological systems.

Given below is a statement followed by two assumptions numbered I and II. You have to consider the statement and the following assumptions and decide which of the assumptions is implicit in the statement.
Statement:
Amit can make students understand the complex mathematical problems in a easy way.
Assumptions:
I. Amit likes Mathematics.
II. Amit can teach physics well.

Select the option that can replace the question mark (?) in the following series.

Every month, Kritika spends 30% of her income on house rent and 60% of the rest on household expenditure. If she saves ₹ 6300 per month, what is her total monthly income?