A stopped B on road and threatened her give away her jewellery to him using a knife. But after hearing to the siren of the police jeep he started snatching the remaining jewellery:-
1
A will be liable for robbery because he committed theft of the jewellery he snatched
2
A will be liable for robbery for the jewellery B delivered to him under threat of injury.
3
A will be liable for dacoity
4
Both a and b