There is no Section 420 now. Sections 141-144 of the IPC were associated with unlawful assembly, but they will now come under Section 187-189(5). Section 121, which dealt with waging war ...
A Peethambaran- IPC Sections 302 (murder), 143 (unlawful assembly), 147, (rioting), 201 (destruction of evidence), 148 (rioting while armed with a deadly weapon), 341 (wrongful restraint ...