+ 1 with Mrudul & Sabyasachi Ji,

It is indeed a member of the Hibiscus (Malvaceae) family & a native of India. Looks like a variant of Red Sorrel or the Indian Sorrel also known as Lal Ambari in Hindi. The red calyces of the plant are exported to the EU & U.S where they are used as food colouring. TFS.