In severe winter in cold countries water pipes burst because (a)water expands on freezing (b)contraction of water pipes (c)high atmospheric pressure (d)combined effect of all the above three.
option a. Water in pipes freeze in bloodless countries. Due to the anomalous enlargement of water, it expands in preference to contacting while there's a fall in temperature beneath 4°c. So, the water pipes burst because of the extra area ate up through the ice after freezing
