Which of the following statements is correct?

a- India and Pakistan also have had problems over the sharing of water of the Indus river.
b- India and Pakistan are in agreement over the demarcation line in Sir Creek in the Rann of Kutch.

Only statement a is correct.

The two countries are not in agreement over the demarcation line in Sir Creek in the Rann of Kutch. The dispute seems minor, but there is an underlying worry that how the dispute is settled may have an impact on the control of sea resources in the area adjoining Sir Creek. India and Pakistan are holding negotiations on all these issues.