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buildForm(): void {
    const questionsArray = this.questionsForm.get('questions') as FormArray;

    this.questions.forEach((question, index) => {
      const optionsArray = this.fb.array(
        question.options.map(option => 
          this.fb.group({
            option_id: [option.idOption],
            seleccionada: [false]
          })
        )
      );

      const otroGroup = this.fb.group({
        texto: ['', [
          Validators.required,
          Validators.minLength(3),
          Validators.maxLength(250), // Adjust to 50 for question with idQuestion = 4 if needed
          Validators.pattern(/^[^´'|\°><[\]{}()=&]*$/) // Excludes special characters
        ]]
      });

      questionsArray.push(
        this.fb.group({
          id_question: [question.idQuestion],
          options: optionsArray,
          otro: otroGroup,
          showOtro: [false] // Track if "Otro" should be visible
        })
      );

      // Initialize showOtro array
      this.showOtro[index] = false;
    });
  }