According to IS: 10500-2012, the maximum permissible limit of total alkalinity as calcium carbonate present in drinking water in the absence of an alternate source of water is:

Correct option is B

→ Ability of water to neutralize the acid.
→ The acceptable limit of total alkalinity is 200 mg/l.
→ The cases of rejection is 600 mg/l for alkalinity.
→Total hardness acceptable limit 200mg/l.
→ Cause of rejection of hardness is 600 mg/l.
→ Acceptable limit of chlorine is 250 mg/l.
→Cause of rejection for chlorine is 1000mg/l