There is a sentence given below which is divided into four or five parts. There is an error in any part(s) of the sentence. From the given options, find out the part which contain(s) error.
a) The Delhi administration plans to establish seven labs
b) through East Delhi to check, validate and recalibrate
c) the operational and reference standards of various weighing scales,
d) weights and measurement tools used in local markets and commercial setups.
e) No erro