Citrus having high malic acid content is:

Correct option is C

Rangpur lime (Citrus limonia) contains high levels of malic acid, which contributes to its distinct sharp and sour flavor. This acidity level is higher than in other citrus types like acid lime or sweet lime. Rangpur lime is often used as a rootstock for other citrus varieties due to its hardiness and disease resistance. Its juice, though acidic, is valued for culinary and medicinal uses.