Group by and count and min query

Consider a Mall for clothing. This mall will include different sections
for males, females and kids. Each section contains different types of
apparels from different brands. There are many apparels with different
designs, of each type. An apparel may be available in one or more
standard sizes (S/M/L/XL/XXL). Sales staff is assigned for each
how to run following query
List the brand having least number of apparels under it.