HOW TO AVOID THE GROUP BY FOR ALL COLUMNS IN SELECTSTATEMENT

Question

SELECT  a.Name,
        a.id,
        a.Type,
        a.date,
        COUNT(b.pac),
        a.ConName
        FROM    TableA a
        JOIN    TableB b ON a.Taskgenid = b.Taskgenid
        AND a.formgenid = b.formgenid
        JOIN    TableC c ON A.id = c.ID
        JOIN    TableD d ON D.Typeid = c.Typeid
        WHERE   a.date BETWEEN @Begindate AND @Enddate
        AND a.type IN (1, 2, 3)
        GROUP BY a.Name,
        a.id,
        a.Type,
        a.date,
        a.ConName


I doesnt want to group the columns a.id,a.type,a.date,a.conname. If i remove those columns it showing error that a.id, a.type,a.date,a.conname is not group by or aggregate.

I want only Count(b.pac)