title: Scala, converting multiple lists to list of tuples
body: <p>I have 3 lists like </p>
  
  <pre><code>val a = List("a", "b", "c")
  val b = List(1, 2, 3)
  val c = List(4, 5, 6)
  </code></pre>
  
  <p>I want convert them as follows</p>
  
  <pre><code>List(("a", 1, 4), ("b", 2, 5), ("c", 3, 6))
  </code></pre>
  
  <p>Please let me know how to get this result</p>