Pick out the correct reasons :
Oil mixed with petrol for two wheelers due to the following reason(s) :
(1)It lubricates the engine parts.
(2)It remove heat inside two engines.
(3)It allows for the deposit of carbon on the spark plug.
(1)(2)and (3)
(1) and (2) only
(2) and (3) only
(1) and (3) only