Assertion (A): Ionisation potential across a period is `Li lt B lt Be lt C`
Assertion (R): Ionisation potential decreases with decrease in atomic size

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true