Which grep command will find all lines of myfile containing a whole 5 letter word starting with a capital letter?
a.grep-wn'[A−Z][a−z]*'myfile
b.grep -wn'[A−Z][a−z]\{5\} 'myfile
c.grep -wn' [A−Z∣a−z]\{5\}'myfile
d.grep -wn'[A−Z]\{1\{[a−z]\{4\} 'myfile