Which one of the following is also known as Top Slip?

The Indira Gandhi Wildlife Sanctuary and National Park is commonly referred to as “Top Slip” (also written Topslip); it lies near Pollachi in Tamil Nadu and is explicitly identified by educational and reference sources as Top Slip . Independent question banks and study materials list the Indira Gandhi Wildlife Sanctuary and National Park as the correct option for the name Top Slip, corroborating this identification in practice questions and teaching resources . While other options given (Simlipal, Periyar, Manjira) are well-known protected areas in other states, the local name Top Slip specifically refers to the Indira Gandhi Wildlife Sanctuary complex near Pollachi.