The Central Himalayas encompasses the areas with the highest topographic relief. The Central Himalayas is again separated into four zones:The High Himalayan Crystalline Sequence (HHCS)The Tethys Himalaya (TH)The Nyimaling-Tso Morari Metamorphic Dome (NTMD)The Lamayuru and Markha Units (LMU)
The Narmada river creates the conventional border between South India and North India. The river runs to the west for a span of 1,312 km and flowed through the Gulf of Khambat (Cambay) into the Arabian Sea, in Gujarat. Like the Mahi River and the Tapti River, the Narmada River is a river flowing from east to west.
North-Eastern Zonal Council has eight states viz, Sikkim, Arunachal Pradesh, Meghalaya, Nagaland, Manipur, Mizoram, Tripura, Assam. Taking states and UTs together, the Northern zonal council has the maximum number of states and UT.